I also updated to the oacs-4-5 tag (at least i thought so), reinstalled the whole system (in a new db) and could nevertheless choose between the membership profile and the user profile. All the problems still existed in the new install as well.
The cvs command i used was "cvs update -r oacs-4-5" in a directory into that i had checked out openacs-4 via "cvs -z3 -d:pserver:anonymous@openacs.org:/cvsroot checkout openacs-4"
Did i use the cvs commands correctly ?